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Surface Current Mapping in the Lower Chesapeake Bay

Surface Current Mapping in the Lower Chesapeake Bay. <insert movie>. Study Area & Antenna Sites. Chesapeake Bay Bridge Tunnel (CBBT). AT OUR FIELD SITES 25.4 MHz CODAR Standard Range Antennas with co-located Tx/Rx MiniMac Field Computers Cell phone/Cable modem connections.

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Surface Current Mapping in the Lower Chesapeake Bay

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  1. Surface Current Mapping in the Lower Chesapeake Bay <insert movie>

  2. Study Area & Antenna Sites

  3. Chesapeake Bay Bridge Tunnel (CBBT) AT OUR FIELD SITES 25.4 MHz CODAR Standard Range Antennas with co-located Tx/Rx MiniMac Field Computers Cell phone/Cable modem connections Ocean View Community Beach (VIEW)

  4. Radial Coverage Antenna Patterns CBBT VIEW

  5. Grid for Total Current Vectors 2 km Grid courtesy of CORDC National Network Preserves orthogonality Red points fail stability angle requirements Baseline

  6. Data Products Updated Hourly (http://www.lions.odu.edu/org/cbc) Time Series Sub-tidal Flow Trajectories

  7. Some Q/C Considerations • Totals • GDOP/HFR-Progs Matlab toolbox error estimates • Radials • Codar spatial and temporal variability statistics within the radial file • Both • Visual outliers (check neighboring vectors / apply filter)

  8. Data Validation by Comparison • Baseline (consistency check) • Tide • Moored ADCP • Towed ADCP

  9. Baseline Comparisons Ideal antenna patterns Measured antenna patterns

  10. Tidal Analysis

  11. Moored ADCP Comparison Difference Statistics Red line = CODAR Blue line = NOAA ADCP Black = |NOAA-CODAR| SiteMeanS.Dev Cape Henry 16.2 14.0 Thimble Shoals 13.2 11.2 York Spit 13.9 10.0 (CH) (TS) (YS)

  12. Towed ADCP Comparisons Intensive study at the baseline & comparison with monthly Bay Mouth cruises

  13. Future Plans • Incorporate data into GIS; map with other regional spatial data • Normal Mode Analysis • Continue to work with trajectories/ plume tracking • Model comparisons • Web page development where totals and time series are freely available for download • Shipping channels • Ocean View beaches AVHRR SST Daily Composite, September 24, 2007 from NOAA Coastwatch ChesROMS model output

  14. Acknowledgements • Larry Atkinson and Jose Blanco • CIT, MACOORA, NOAA • CODAR support • Advice and assistance from numerous other HF RADAR operators

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